Average Co-Inventor Count = 2.25
ph-index = 3
The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.
Company Filing History:
1. Hitachi, Ltd. (3 from 42,488 patents)
2. Hitachi Elevator Engineering Co., Ltd. (2 from 3 patents)
3 patents:
1. 5040659 - Indicating apparatus for passenger conveyor, indicating body used
2. 4819781 - Passenger conveyor with unitary balustrade panel support members
3. 4598811 - Balustrade for a passenger conveyor